CN213540331U - Horizontal well top cementing device - Google Patents
Horizontal well top cementing device Download PDFInfo
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- CN213540331U CN213540331U CN202022303450.1U CN202022303450U CN213540331U CN 213540331 U CN213540331 U CN 213540331U CN 202022303450 U CN202022303450 U CN 202022303450U CN 213540331 U CN213540331 U CN 213540331U
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- sliding sleeve
- sleeve
- horizontal well
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Abstract
The utility model provides a horizontal well top cementing device, include: the side wall of the shell is provided with a plurality of circulating channels; the sliding sleeve assembly is concentrically arranged in the shell and comprises an upper sliding sleeve, a middle sliding sleeve and a switch sleeve, wherein the middle sliding sleeve is connected to the lower end of the upper sliding sleeve; and the salvage mechanism can lift the sliding sleeve assembly to reset and close the circulating channel, and can drive the switch sleeve to shear the second shear pin so as to lift the switch sleeve out of the shaft, thereby realizing the full drift diameter.
Description
Technical Field
The utility model relates to a horizontal well fracturing technical field of borehole operation, concretely relates to horizontal well top cementing device.
Background
At present, various reservoir transformation technologies are generally adopted, a large drainage channel is established in a shaft, and the yield and the production efficiency of a compact oil and gas reservoir and a shale gas single well are improved. However, for complex reservoirs such as a high-pressure water layer, a leakage layer or a multi-pressure system reservoir adjacent to the top of the tail pipe, if large-displacement fracturing fracture-making reservoir transformation construction operation is performed, the water layer, the leakage stratum or other pressure system reservoirs are easily communicated, so that well shaft flooding is caused, oil and gas enter the leakage layer or a production pressure system is damaged, the production efficiency of an oil and gas well is low, and the normal operation of the oil and gas well is influenced. Therefore, before the complex reservoir is reformed, weak well walls such as formations adjacent to a water layer and losing risks need to be sealed and consolidated through well cementing measures so as to enhance the pressure bearing capacity of the well walls, reduce the potential risks and improve the implementation efficiency and the yield of the reservoir reforming technology.
In the prior art, the sealing operation adopts a mode of sealing cement in the whole well and then performing perforation fracturing, however, the sealing cement in the whole well has the disadvantages of high cost, time and labor consumption, low operation efficiency, poor effect, high pressure during well cementation, and easy formation collapse, which results in the occurrence of lost circulation accidents. And an external pipe packer is adopted to pack off a weak stratum, the requirement of the external pipe packer adopted by the mode on the open hole diameter is higher, the external pipe packer is difficult to seal in an irregular borehole for a long time under high pressure, the applicability is poor, and the sealing effect is low.
SUMMERY OF THE UTILITY MODEL
To the technical problem as above, the utility model aims at providing a horizontal well top cementing device, it can the pit shaft carry out the well cementation operation to weak stratum, seals weak stratum to can effectively avoid fine and close oil gas reservoir or shale gas horizontal well fracturing horizontal segment top weak stratum to leak out.
Therefore, according to the utility model provides a horizontal well top cementing device, include: the side wall of the shell is provided with a plurality of circumferentially and uniformly distributed circulating channels, and two ends of the shell are respectively and fixedly connected with an upper joint and a lower joint; the sliding sleeve assembly is concentrically arranged in the shell and comprises an upper sliding sleeve, a middle sliding sleeve connected to the lower end of the upper sliding sleeve and a switch sleeve correspondingly arranged on the radial inner sides of the upper sliding sleeve and the middle sliding sleeve, the upper sliding sleeve is connected with the shell through a first shear pin, the upper sliding sleeve and the middle sliding sleeve are fixedly connected through threads, and the switch sleeve is connected with the middle sliding sleeve through a second shear pin; the pressure building ball seat is fixedly arranged on the inner wall surface of the switch sleeve; and the salvage mechanism can lift the sliding sleeve assembly upwards in a well shaft to reset and close the circulating channel, and can drive the switch sleeve to shear the second shear pin so as to lift the switch sleeve out of the well shaft, thereby realizing the full drift diameter.
In one embodiment, the sliding sleeve assembly further comprises a lower sliding sleeve connected to the lower end of the middle sliding sleeve.
In one embodiment, the lower sliding sleeve is connected with the middle sliding sleeve through a third shear pin, and the shear value of the third shear pin is smaller than that of the second shear pin.
In one embodiment, a first anti-back snap spring is arranged between the lower sliding sleeve and the shell, an anti-back clamping groove is arranged on the inner wall of the shell,
the first anti-retreat clamp spring can be clamped with the anti-retreat clamping groove in an adaptive mode, so that the sliding sleeve assembly is axially locked.
In one embodiment, a second anti-withdrawal snap spring is arranged in the outer wall area of the upper end of the upper sliding sleeve, anti-withdrawal threads are arranged on the inner wall surface of the lower end of the upper joint,
the fishing mechanism can drive the sliding sleeve assembly to move upwards to enable the second anti-withdrawal snap spring to be meshed with the anti-withdrawal threads in a matched mode, and therefore the upper sliding sleeve is axially locked.
In one embodiment, a contraction snap spring is arranged between the switch sleeve and the axial upper end of the middle sliding sleeve, the contraction snap spring can transmit the pressure applied to the switch sleeve to the middle sliding sleeve when the switch sleeve is suppressed, and the switch sleeve can be separated from the middle sliding sleeve after the second shear pin is sheared by the switch sleeve.
In one embodiment, the fishing mechanism comprises a support sleeve, an elastic claw connecting sleeve sleeved on the radial outer side of the support sleeve and a joint fixedly connected to the upper end of the support sleeve, wherein the joint is used for being connected with a feeding tool.
In one embodiment, the outer wall surface of the lower end of the elastic claw connecting sleeve is provided with a radial bulge protruding outwards in the radial direction, the inner wall area of the upper end of the switch sleeve is provided with an annular clamping groove recessed outwards in the radial direction,
the fishing mechanism can be matched and clamped into the annular clamping groove through the radial protrusion, so that the switch sleeve is lifted up.
In one embodiment, a plurality of sealing members axially spaced apart from each other are provided between the upper sliding sleeve and the housing, and the plurality of sealing members are respectively located on both axial sides of the circulation passage in a state where the sliding sleeve assembly closes the circulation passage.
In one embodiment, the upper joint is fixedly connected with the upper end of the shell through a threaded connection and a set screw, and the lower joint is fixedly connected with the lower end of the shell through a threaded connection and a set screw.
Compared with the prior art, the utility model has the advantages of:
according to the utility model discloses circulation passageway can be opened to the suppress pressure by horizontal well top cementing device to carry out local well cementation operation to the weak stratum of horizontal well, the weak stratum of consolidated horizontal well, and then through transferring tieback fracturing pipe string in order to carry out normal fracturing operation, be favorable to improving shale gas well oil gas production increase very much, can greatly reduced oil gas well exploitation cost. And moreover, the circulation channel can be closed through the adaptive fishing mechanism at the later construction stage, so that the well cementation quality is effectively improved. Meanwhile, the fishing mechanism can provide parts such as a switch sleeve and a suppressed pressure ball seat, so that the full drift diameter of the sleeve is realized, and the influence on later-stage construction operation is effectively avoided.
Drawings
The present invention will be described with reference to the accompanying drawings.
Fig. 1 shows the structure of the horizontal well top cementing device according to the present invention when it does not include a fishing mechanism.
Fig. 2 shows the structure of a switch sleeve in the top cementing mechanism of the horizontal well shown in fig. 1.
Fig. 3 shows the structure of the fishing mechanism.
FIG. 4 is a schematic view of the fishing mechanism engaged with the switch housing adapter.
Fig. 5 is a schematic view of the second anti-back clamp spring 3 and the anti-back thread of the upper joint.
Fig. 6 shows a structure in which a circulation passage of a horizontal well top cementing apparatus is in an open state.
Fig. 7 shows the structure of the horizontal well top cementing device in a full-bore state.
In the present application, all the figures are schematic and are only intended to illustrate the principles of the present invention and are not drawn to scale.
Detailed Description
The present invention will be described with reference to the accompanying drawings.
It is required to explain in this application that will be according to the utility model discloses a well head is close to in going into the pit shaft to horizontal well top cementing device one end definition is upper end or similar term, and the one end that will keep away from the well head is defined as lower extreme or similar term.
Fig. 1 shows the structure of a horizontal well top cementing apparatus 100 according to the present invention. As shown in fig. 1, the horizontal well top cementing apparatus 100 comprises a cylindrical casing 2 and a slip sleeve assembly concentrically disposed within the casing 21. A plurality of circulation passages 21 penetrating the side wall of the housing 2 are provided on the side wall of the housing 2, and the plurality of circulation passages 21 are uniformly distributed in the circumferential direction. The circulation channel 21 is preferably provided in the area of the housing 2 near the upper end. The sliding sleeve assembly is capable of opening and closing the circulation passage 21. When the circulation passage 21 is opened, the inner passage of the string and the outer ground layer can be communicated, thereby enabling the fixing work.
As shown in fig. 1, the upper and lower ends of the housing 2 are respectively and fixedly connected with an upper joint 1 and a lower joint 13, and the upper joint 1 and the lower joint 13 are respectively used for connecting other pipe strings. The upper joint 1 is fixedly connected with the upper end of the shell 21 in a threaded connection mode, and the lower joint 13 is fixedly connected with the lower end of the shell 21 in a threaded connection mode. In order to ensure the stability of the connection between the upper joint 1 and the lower joint 13 and the housing 21, the upper joint 1 and the lower joint 13 are also in a fastening connection with the housing 2 by means of set screws, respectively.
According to the utility model discloses, the sliding sleeve subassembly includes sliding sleeve 5, connects well sliding sleeve 9 at last sliding sleeve 5 lower extreme to and correspond and set up at the radial inboard switch cover 4 of last sliding sleeve 5 well sliding sleeve 9. As shown in fig. 1, the upper sliding sleeve 5 is fixedly connected with the housing 2 through a first shear pin 6, the upper sliding sleeve 2 and the middle sliding sleeve 9 form a fixed connection through a thread, and the switch sleeve 4 is fixedly connected with the middle sliding sleeve 9 through a second shear pin 8. The shear value of the first shear pin 6 is smaller than the shear value of the second shear pin 8. A pressure-retaining ball seat 14 is fixedly attached to an inner wall surface of the switch cover 4. The pressure building ball seat 14 is preferably fixedly connected to the inner wall surface of the switch sleeve 4 near the lower end by a screw thread.
In the initial state, the sliding sleeve assembly is correspondingly positioned at the inner side of the circulation channel 21, so as to close and close the circulation channel 21. At this point, the horizontal well top cementing apparatus 100 may be lowered into the wellbore. Suppress the pressure ball 15 in order to suppress the pressure ball seat through throwing to the well head, thereby can make the upper sliding sleeve 5 cut first shear pin 6, so that the sliding sleeve subassembly is down and open circulation channel 21 for shell 2, thereby switch on the inside passage and the outside stratum of horizontal well top cementing device 100, at this moment, can carry out the well cementation and need the operation.
As shown in fig. 2, the switch case 4 is cylindrical. A radially outwardly concave annular groove 41 is provided in the upper inner wall region of the switch sleeve 4. The annular slot 41 is adapted to engage with the fishing mechanism 20 (see below) so that the fishing mechanism 20 can lift the switch sleeve 4.
According to the utility model discloses, the sliding sleeve subassembly still includes lower sliding sleeve 11. As shown in fig. 1, the lower sliding sleeve 11 is connected to the lower end of the middle sliding sleeve 9. The lower sliding bush 11 is fixedly connected with the middle sliding bush 9 through a third shear pin 10, and the shear value of the third shear pin 10 is larger than that of the first shear pin 6 and smaller than that of the second shear pin 8. A first anti-back snap spring 12 is arranged between the lower sliding sleeve 11 and the shell 2, and an anti-back clamping groove (not shown) is arranged on the inner wall of the shell 2. The anti-back clamping groove can be provided with anti-back threads, for example. The first anti-retreat snap spring 12 can move downwards at the sliding sleeve assembly and is clamped with the anti-retreat clamping groove in an adaptive manner after the circulating channel 21 is opened, so that the sliding sleeve assembly is axially locked, the sliding sleeve assembly is effectively prevented from retreating, and the influence on the well cementation operation caused by the influence on the normal opening of the circulating channel is avoided.
According to the utility model discloses, horizontal well top cementing device 100 still includes salvage mechanism 20. The fishing mechanism 20 can be lowered into the wellbore by a running tool and the sleeve assembly can be lifted up to reset, thereby closing the circulation passage 21. As shown in fig. 3, the fishing mechanism 20 includes a supporting sleeve 201, an elastic claw connecting sleeve 22 sleeved on the radial outside of the supporting sleeve 201, and a connector 23 fixedly connected to the upper end of the supporting sleeve 201, 23 for connecting with a running tool. A radial protrusion 221 protruding radially outward is provided on the outer wall surface of the lower end of the elastic claw coupling sleeve 22. The radial protrusion 221 can be fittingly engaged with the annular groove 41 of the switch sleeve 4, so that the fishing mechanism 20 can lift the switch sleeve 4. Fig. 4 shows the fishing mechanism 20 in the state in which it is adapted to engage with the switch housing 4.
In the process of lifting the sliding sleeve assembly through the fishing mechanism 20, because the lower sliding sleeve 11 forms axial locking under the action of the first anti-withdrawal snap spring 12, after the switch sleeve 4 drives the middle sliding sleeve 9 to shear the third shear pin 10 through the second shear pin 8, the switch sleeve 4 drives the middle sliding sleeve 9 and the upper sliding sleeve 5 to move upwards together until the upper sliding sleeve 5 is reset to close the circulating channel 21 again. After the circulation channel 21 is closed, the salvaging mechanism 20 is continuously lifted to drive the switch sleeve 4 to cut off the second shear pin 8, so that the switch sleeve 4 and the pressure-building ball seat 14 can be lifted out of the shaft, the full diameter of the casing is realized, and the influence on later-stage construction operation is avoided. It will be appreciated that in this process, since the shear value of the second shear pin 8 is greater than the shear value of the third shear pin 10, during the lifting process, the third shear pin 10 is sheared first, and the lifting force is continued to be applied before the second shear pin 8 is sheared.
In one embodiment, a shrink snap spring 7 is arranged between the switch sleeve 4 and the middle sliding sleeve 9, the shrink snap spring 7 can transmit the pressure applied to the switch sleeve 4 to the middle sliding sleeve 9 when the switch sleeve 4 is pressed, and the switch sleeve 4 can be separated from the middle sliding sleeve 9 after the second shear pin 8 is sheared off by the switch sleeve 4. As shown in fig. 2, a radial inward-concave mounting groove 42 is formed on the outer wall surface of the switch sleeve 4 close to the lower end, the mounting groove 42 includes a first groove body and a second groove body located at the lower end of the first groove body, and the radial depth of the first groove body is smaller than that of the second groove body. The shrink snap spring 7 is initially installed in the first groove body of the installation groove 42, and the lower end face of the shrink snap spring 7 abuts against the axial upper end face of the middle sliding sleeve 9, so that the pressure exerted on the switch sleeve 4 can be transmitted. After the second shear pin 8 is sheared by the lifting switch sleeve 4, the lifting switch sleeve is lifted continuously, the switch sleeve goes upward, so that the shrinkage clamp spring 7 enters the second groove body of the mounting groove 42, and the lifting switch sleeve 4 can be lifted continuously.
According to the utility model discloses, be equipped with the second in the outer wall region of upper end of last sliding sleeve 5 and prevent moving back jump ring 3, be equipped with at the internal face of the lower extreme of top connection 1 and prevent moving back the screw thread. The salvage mechanism 20 drives the sliding sleeve assembly to move upwards to enable the second anti-retreat clamp spring 3 to be meshed with the anti-retreat thread in a matching mode, and therefore the upper sliding sleeve 5 is axially locked. Therefore, after the upper sliding sleeve 5 is reset and the circulation channel 21 is closed again, the upper sliding sleeve 5 and the upper connector 1 can be axially locked through the second anti-retreat snap spring 3, so that the axial movement of the upper sliding sleeve 5 is prevented, and the sealing performance of the circulation channel 21 is effectively ensured. Fig. 5 is a schematic view of the second anti-back clamp spring 3 and the anti-back thread.
In order to ensure the sealing performance when the circulation passage 21 is closed, a plurality of sealing members axially spaced from each other are provided between the upper sliding sleeve 5 and the housing 2, and the plurality of sealing members are respectively located on both axial sides of the circulation passage 21 in a state where the sliding sleeve assembly closes the circulation passage 21. In addition, in order to ensure the overall sealing performance of the horizontal well top cementing device 100, sealing elements may be arranged at the joints of the upper joint 1, the lower joint 13 and the shell 2, or between the middle sliding sleeve 9, the lower sliding sleeve 11 and the shell, or between the switch sleeve 4 and the upper sliding sleeve 5 and the pressure building ball seat 14.
The operation of the horizontal well top cementing apparatus 100 according to the present invention will be briefly described below. The horizontal well top cementing apparatus 100 is initially lowered into the wellbore, at which time the slip sleeve assembly closes the circulation passage 21. Fig. 1 shows a structure in which a circulation passage 21 of a horizontal well top cementing apparatus 100 is in an initial closed state.
In a weak stratum where local well cementation operation is required to be carried out in the horizontal well, a pressure building ball 15 is thrown to a well opening, the pressure building ball 15 is located on a pressure building ball seat 14, and high-pressure liquid is injected for building pressure, so that the ball seat 14 applies downward force to the switch sleeve 4 and the downward force is sequentially transmitted to the second shear pin 8, the middle sliding sleeve 9 and the upper sliding sleeve 5. When certain pressure is reached, the upper sliding sleeve 5 shears the first shear pin 6, the sliding sleeve assembly moves downwards to open the circulating channel 21, and therefore the internal channel of the horizontal well top cementing device 100 is communicated with an external stratum through the circulating channel 21. Fig. 6 shows a structure in which the circulation passage 21 of the horizontal well top cementing apparatus 100 is in an open state. At this time, a well cementing operation can be performed to seal the weak formation of the horizontal well.
After the well cementation operation is finished, the fishing mechanism 20 can be lowered through a feeding tool, after the elastic claw connecting sleeve 22 in the fishing mechanism 20 is matched and clamped with the switch sleeve 4, the feeding tool is lifted up to enable the fishing mechanism 20 to drive the switch sleeve 4, the upper sliding sleeve 5 and the middle sliding sleeve 9 to cut off the third shear pin 10 and then move upwards until the upper sliding sleeve 5 is reset to close the circulating channel 21 again. At this time, the second anti-back snap spring 3 is engaged with the anti-back thread of the upper joint 1, so that the upper sliding sleeve 5 is axially locked, and the closing of the circulation passage 21 is ensured. And continuously applying the lifting force, the fishing mechanism 20 drives the switch sleeve 4 to cut off the second shear pin 8, and the switch sleeve 4 is separated from the middle sliding sleeve 9. And the lifting is continued, the fishing tool 20 can drive the switch sleeve 4, the suppressed pressure ball seat 14 and other parts to lift out of the shaft, so that the full drift diameter of the casing pipe is realized, and the influence on later-stage construction operation is avoided. Fig. 7 shows the structure of the horizontal well top cementing apparatus 100 in a full-bore state.
According to the utility model discloses circulation channel 21 can be opened to horizontal well top cementing device 100 can suppress the pressure to carry out the local well cementation operation to the weak stratum of horizontal well, seal the weak stratum of horizontal well, and then through transferring tieback fracturing pipe string in order to carry out normal fracturing operation, be favorable to very much improving shale gas well oil gas production increase, can greatly reduced oil gas well exploitation cost. In addition, the circulation channel 21 can be closed by the adaptive fishing mechanism 20 at the later construction stage, so that the well cementation quality is effectively improved. Meanwhile, the fishing mechanism 20 can put forward the switch sleeve 4 and the suppressed pressure ball seat 14 and other parts, so that the full drift diameter of the sleeve is realized, and the influence on later-stage construction operation is effectively avoided.
Finally, it should be noted that the above description is only a preferred embodiment of the present invention, and should not be construed as limiting the present invention in any way. Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications may be made to the embodiments described in the foregoing examples, or that equivalents may be substituted for elements thereof. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. The utility model provides a horizontal well top cementing device which characterized in that includes:
the device comprises a shell (2), wherein the side wall of the shell is provided with a plurality of circumferentially and uniformly distributed circulating channels (21), and two ends of the shell are respectively and fixedly connected with an upper joint (1) and a lower joint (13);
the sliding sleeve assembly is concentrically arranged in the shell and comprises an upper sliding sleeve (5), a middle sliding sleeve (9) connected to the lower end of the upper sliding sleeve and a switch sleeve (4) correspondingly arranged on the radial inner sides of the upper sliding sleeve and the middle sliding sleeve, the upper sliding sleeve is connected with the shell through a first shear pin (6), the upper sliding sleeve and the middle sliding sleeve form fixed connection through threads, and the switch sleeve is connected with the middle sliding sleeve through a second shear pin (8);
a pressure building ball seat (14) fixedly arranged on the inner wall surface of the switch sleeve; and
a salvaging mechanism (20),
the sliding sleeve assembly closes the circulation channel in an initial state, the upper sliding sleeve can be made to shear the first shear pin by suppressing the pressure of the pressure-suppressing ball seat, so that the sliding sleeve assembly moves downwards to open the circulation channel, the internal channel and the external stratum of the horizontal well top cement injection device are conducted, the fishing mechanism can be put into the shaft to lift the sliding sleeve assembly upwards to reset and close the circulation channel, and the switch sleeve can be driven to shear the second shear pin, so that the switch sleeve is lifted out of the shaft, and the full drift diameter is achieved.
2. Horizontal well top cementing apparatus according to claim 1, wherein said sliding sleeve assembly further comprises a lower sliding sleeve (11) connected to the lower end of said middle sliding sleeve.
3. The horizontal well top cementing device according to claim 2, characterized in that the lower sliding sleeve is connected with the middle sliding sleeve through a third shear pin (10), and the shear value of the third shear pin is smaller than that of the second shear pin.
4. The horizontal well top cementing device according to claim 2 or 3, characterized in that a first anti-back snap spring (12) is arranged between the lower sliding sleeve and the outer shell, an anti-back snap groove is arranged on the inner wall of the outer shell,
the first anti-retreat clamp spring can be clamped with the anti-retreat clamping groove in an adaptive mode, so that the sliding sleeve assembly is axially locked.
5. The horizontal well top cementing device according to claim 1, characterized in that a second anti-back snap spring (3) is arranged on the outer wall area of the upper end of the upper sliding sleeve, an anti-back thread is arranged on the inner wall surface of the lower end of the upper joint,
the fishing mechanism can drive the sliding sleeve assembly to move upwards to enable the second anti-withdrawal snap spring to be meshed with the anti-withdrawal threads in a matched mode, and therefore the upper sliding sleeve is axially locked.
6. The horizontal well top cementing device according to claim 1, characterized in that a contraction snap spring (7) is arranged between the switch sleeve and the axial upper end of the middle sliding sleeve, and the contraction snap spring can transmit the pressure applied to the switch sleeve to the middle sliding sleeve during pressure holding and can separate the switch sleeve from the middle sliding sleeve after the switch sleeve shears the second shear pin.
7. The horizontal well top cementing device according to claim 1, characterized in that the fishing mechanism comprises a support sleeve (201), an elastic claw connection sleeve (22) sleeved on the radial outer side of the support sleeve, and a joint (23) fixedly connected to the upper end of the support sleeve, wherein the joint is used for being connected with a feeding tool.
8. The horizontal well top cementing device according to claim 7, characterized in that the outer wall surface of the lower end of the elastic claw connecting sleeve is provided with a radial bulge (221) protruding outwards in the radial direction, the inner wall area of the upper end of the switch sleeve is provided with an annular clamping groove (41) recessed outwards in the radial direction,
the fishing mechanism can be matched and clamped into the annular clamping groove through the radial protrusion, so that the switch sleeve is lifted up.
9. The horizontal well top cementing apparatus according to claim 1, wherein a plurality of seals are axially spaced apart from each other between said upper sliding sleeve and said casing, said plurality of seals being located on both axial sides of said circulation passage in a state in which said sliding sleeve assembly closes said circulation passage, respectively.
10. The horizontal well top cementing device according to claim 1, wherein the upper joint is fixedly connected with the upper end of the outer shell through threaded connection and a set screw, and the lower joint is fixedly connected with the lower end of the outer shell through threaded connection and a set screw.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022303450.1U CN213540331U (en) | 2020-10-16 | 2020-10-16 | Horizontal well top cementing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022303450.1U CN213540331U (en) | 2020-10-16 | 2020-10-16 | Horizontal well top cementing device |
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| Publication Number | Publication Date |
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| CN213540331U true CN213540331U (en) | 2021-06-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202022303450.1U Active CN213540331U (en) | 2020-10-16 | 2020-10-16 | Horizontal well top cementing device |
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| CN (1) | CN213540331U (en) |
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- 2020-10-16 CN CN202022303450.1U patent/CN213540331U/en active Active
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